Graco Inc 300E, 313314B Electric Motor Will Not Shut Off, Troubleshooting Procedure, Yes

			Repair / Réparation / Reparación
	WHAT TO CHECK		WHAT TO DO
TYPE OF PROBLEM	If check is OK, go to next check		When check is not OK, refer to this column
Sprayer does not run at all	Check to see if control board power	1.	Make sure motor air intake is not blocked.
	module is operating at a high
Digital display shows E=10		2.	Make sure control board is properly connected
	temperature. Module is likely too hot
	or motor is running too hot.		to back plate and that conductive thermal paste
			is used on power components.
		3.	Replace control board.
Control board status light blinks		4.	Replace motor.
10 times repeatedly

Electric Motor Will Not Shut Off

1.Relieve Pressure, page 15. Leave prime valve open and power switch OFF.

Troubleshooting Procedure

Plumb pressure gauge into paint hose, plug sprayer in, and turn power switch ON. Does sprayer reach or exceed its maximum pressure?

2.Remove control box cover so the control board status light can be viewed if available.

NO	Mechanical problem: See the proper
	fluid pump manual for the sprayer for
	further trouble shooting procedures.

YES

Unplug the transducer from control board. Does motor stop running?

NO

Replace the control board.

YES

Bad transducer. Replace and test

with a new one.

313314B 39